Geoege cowie



UNITED STATES PATENT OFFICE.

GEORGE ooWIE, .13., OF UNITED STATES NAVY.

SCALING-TOOL FOR BOILERS, 86C. .1

SPECIFICATION forming part of Letters Patent No. 368,876, dated August 23, 1887. Application filed January 3, 1887 Serial No. 223,271. (N model.)

My invention relates to that class of seal-- IO ing-tools particularly adapted to remove scale from the tube-sheets in boilers. Owing to the close proximity of the tubes the method-has been to scale the tube-sheet between the vertical rows of tubes with a bar or pick, thus leaving the space on the tube-sheet between the horizontal rows of the tubes, in which the scale would collect to such a thickness that the water could not come in contact with the sheet.

In this locality, where the heat from the furnace enters the tubes, the high temperature will soon burn out the end of the tubes,or the tube-sheet is burned or cracked.

WVith my improved tool every part of the tube-sheet between the horizontal rows of tubes 2 5 can be thoroughly cleaned, the remainder of the sheet being cleaned in the ordinary manner, the result of which is to prolong the life of the tubes and tube-sheet and to have a continuous use of the boiler.

Referring to the drawings, in which the same letters of reference represent the same parts in each of the figures, Figure l is a perspective view of my improved tool for sealing tube-' sheets. Fig. 2 is a side view of a scaling-ham mer used in connection with my tube-sheet tool. Fig. 3 is a view showing the manner of working the tube-sheet tool above and below 7 the tubes, and Fig. 4 is a view showing the relative position of the tool to the tubes.

The tool consists of a stock or blade, A, of steel, provided with two cutting-edges, a a, upon one side, which are in the same plane. The scale being of such a hard substance, it would be difficult to remove it if the cuttingedge of the tool extended the full length of the stock or blade.

The tool is provided with a removable handle, B, which is attached by means of a collar on the handle and the nuts 0. The handle is made removable, soas to attach to the tool 0 handles of different lengths, as the limited space in, the boilers and the distance of the point to be reached will permit, also, to reverse the tool, it being made side cutting,

so as to cut close to the tubes, both positions of which are shown in Fig. 3.

Fig. 4 shows an ordinary hammerhaving a face upon one end and a cutter, (1, upon the other. This hammer I lay no claim to, but it is shown simply to illustrate how the scale is removed from the tube-sheet.

The scale is removed from between the vertical rows of tubes with the cutting-edge of the hammer, and from the sheet between the horizontal rows of tubes by the tool shown in Fig. 6

.1, which, when in position, is struck by the hammer.

It is evident that the tool may be struck by anything convenient, but the hammer shown may be used for both purposes.

The operation is as follows: The tool being made narrow enough when turned sidewise to pass through the vertical spaces between the tubes it is lowered to that part of the tubesheet from which the scale is to be removed. It is then turned in the proper position, (see Fig. 4,) and is ready to be struck by the hammer. By moving the tool about the scale is soon removed from tube-sheet between the horizontal rows of tubes.

In Fig. l I show an old form of tool for scaling the tubes. This I do not claim; but

What I do claim, and desire to secure by Letters Patent, is-

A tool for sealing boilers, consisting of a 8: stock or blade. beveled to an edge on one side and having the central portion of said edge removed to form a cutter at each end of the blade, and a removable handle, whereby the blade may be reversed to bring the cuttingedges into operative contact with either the upper or lower sides of the boiler-tubes and with the vertical portions of the tube-sheets between the tubes.

GEORGE (JOWIE, JR. Witnesses:

JAMES H. DURAND, CHAS. G. Horn. 

